2016 AMC 10A Problem 3

Attempt Problem 3 of the 2016 AMC 10A below, then check your answer against the professionally curated solution from LIVE by Po-Shen Loh. You can also try the full timed exam, view all 2016 AMC 10A solutions, or check the answer key.

All problems are used with official legal permission of the Mathematical Association of America (MAA).

3.

For every dollar Ben spent on bagels, David spent 2525 cents less. Ben paid $12.50\$12.50 more than David. How much did they spend in the bagel store together?
$37.50\$37.50
$50.00\$50.00
$87.50\$87.50
$90.00\$90.00
$92.50\$92.50
Answer: C
Concepts:ratio and proportionmoney
Small hint:
David spends 7575 cents for each dollar Ben spends
Big hint:
The difference is one quarter of Ben’s spending
Solution:
For each dollar Ben spent, David spent 7575 cents, so the difference was 2525 cents. The total difference $12.50\$12.50 is therefore one quarter of Ben’s spending.
Ben spent 12.50÷0.25=5012.50\div0.25=50 dollars, and David spent 37.5037.50 dollars. Together they spent 87.5087.50 dollars.
Thus, the correct answer is C.
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